Citation: Standardized battery wants to appeal to all gadgets (2008, February 29) retrieved 18 August 2019 from https://phys.org/news/2008-02-standardized-battery-appeal-gadgets.html The Green Cell concept would provide a standard battery for every cell phone and personal electronic device. Organic solar cells that last 10 years in space That’s the idea from Theo Richardson, Charles Brill, and Alex Williams of Rich, Brilliant, Willing. Their standardized battery concept, called the Green Cell, won third place at the recent Greener Gadgets Competition. Most importantly, the Green Cell isn´t made from toxic chemicals and could be partially recycled to reduce landfill waste. The designers say that the battery could either be recharged from home or at public charge stations. When the batteries eventually wear out, they could be exchanged for a fresh battery at a local vending machine that doubles as a recycling center. Every time you buy a new gadget or upgrade your cell phone, you wouldn’t have to toss out your old charger and battery, but could simply reuse them with your new device. Currently, manufacturers use different batteries and chargers for just about every make and model of phone and personal electronic device. Manufacturers may not be overly excited about configuring every gadget to the size and voltage of the standardized Green Cell. But, the Green Cell designers say that the benefits could help everyone.”Agreeing to adopt a handful of constraints doesn’t hurt one’s marketing campaign; rather, it’s a new opportunity for a new business model,” they explain. “It´s a more responsible approach, and we’ll all live a little more happily ever after.”Rich, Brilliant, Willing suggested another interesting idea at the Greener Gadgets Competition: “nutrition” labels for gadgets. The standardized label would disclose all the material contents of the gadget, including the amounts of heavy metals used. They hope that the label would provide the public with the knowledge to make greener purchases and encourage manufacturers to use healthier manufacturing processes and materials.More information: Rich, Brilliant, Willingvia: Inhabitat All plug-in electronics use the same power cord, and all battery-operated devices use one of a few standard sizes. Even computer accessories mostly all have USB capabilities. So why not standardize rechargeable batteries for all cell phones and other mobile gadgets? Explore further This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
(Phys.org) — In the eye, the retina is the light sensitive tissue that lines its inner surface; packed with ganglion neurons, its job is to convert incoming information to something that the brain can understand. In some animals, such as people, cats and the macaque, the density of neurons in certain areas of the retina accounts for the highest resolution images sent to the brain. But some animals apparently reserve such areas for other jobs. Mice for example, according to new research by a team from Harvard, only use their high resolution areas when under threat from above. As they describe in their paper published in the Proceedings of the National Academy of Sciences, the team notes that high density neural areas in the retinas of mice are only activated when shadows from birds flying overhead are detected. Citation: Researchers find high-resolution retina cells in mice only activate when birds fly over (2012, August 14) retrieved 18 August 2019 from https://phys.org/news/2012-08-high-resolution-retina-cells-mice-birds.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Immune cells help heal eye injury in mice More information: PNAS August 13, 2012 doi: 10.1073/pnas.1211547109 Journal information: Proceedings of the National Academy of Sciences © 2012 Phys.Org Explore further In people, the highly dense parts of the retina are used virtually every waking moment. When focusing on something, the neural network of ganglion cells is busy converting light to images that are sent to the brain via the optic nerve. The only time this process quiets is when people are either lost in thought, or asleep. With mice, according to this new research, things are very different.To find out how mice use their high-resolution ganglion, the team attached a tiny camera to a rat volunteer and then watched to see what sorts of things it focused on. Next, they played the video back directly onto the retinas of several test mice while simultaneously monitoring neural cell activity. In so doing, they found that the high-resolution cells sat mostly quiet, doing nothing.As it turned out, the cells weren’t actually doing nothing, they were waiting.When silhouettes of birds were projected overhead, the waiting ended as the ganglia sprang into action, interpreting every movement. This shows, the researchers say, that the high-resolution neuron groups in mice retinas serve not as interpreters of everyday life, but as highly specific predator detectors. More specifically they found the nerves reacted when the birds were in their center of view, meaning close and ready to snatch them up. Sadly, they also found that the nerves quit firing once the birds came close enough, indicating the mice were doomed.After testing several scenarios, the team found that the retina cells in the mice tended to fire when detecting virtually any object that appeared against a blank backdrop, which was also moving, such as is the case of a bird flying in the sky. Thus it appears, for mice, it’s better to focus sharply only when predators from the sky are near, so as to best prepare for a quick emergency plan.
(Phys.org)—A team of researchers at Tsinghua University in China has, according to a report in Newscientist, found a way to mimic, if only in a small way, the shape shifting robot in the Terminator movies. The team has published their findings in the journal Advanced Materials. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen Citation: Shape shifting liquid metal able to propel itself through liquids (w/ video) (2015, March 11) retrieved 18 August 2019 from https://phys.org/news/2015-03-shifting-liquid-metal-propel-liquids.html PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen Researchers develop a way to cause static self-assembly using magnets and ferrofluids © 2015 Phys.org Play Credit: Advanced Materials, Article first published online: 3 MAR 2015. DOI: 10.1002/adma.201405438 More information: Self-Fueled Biomimetic Liquid Metal Mollusk, Advanced Materials, Article first published online: 3 MAR 2015. DOI: 10.1002/adma.201405438AbstractA liquid metal motor that can “eat” aluminum food and then move spontaneously and swiftly in various solution configurations and structured channels for more than 1 h is discovered. Such biomimetic mollusk is highly shape self-adaptive by closely conforming to the geometrical space it voyages in. The first ever self-fueled pump is illustrated as one of its typical practical utilizations.via Newscientist PausePlay% buffered00:0000:00UnmuteMuteDisable captionsEnable captionsSettingsCaptionsDisabledQuality0SpeedNormalCaptionsGo back to previous menuQualityGo back to previous menuSpeedGo back to previous menu0.5×0.75×Normal1.25×1.5×1.75×2×Exit fullscreenEnter fullscreen Explore further Play Credit: Advanced Materials, Article first published online: 3 MAR 2015. DOI: 10.1002/adma.201405438 Journal information: Advanced Materials As part of an effort to better understand the properties of liquid metals, the researchers were working with gallium—after adding a little bit of indium and tin they discovered that if a bit of aluminum was affixed to a single drop of the alloy (to serve as fuel) and the result was dropped into a container of sodium hydroxide (or even salt water) the drop would propel itself around the container for approximately one hour. In subsequent tests they found that if the container was shaped with channels, the drop could be made to follow a pre-designated path. What’s more, they noted that if the drop encountered a part of the channel that was slimmer than it was, it could squeeze through.Surprised by the movement of the drop, the researchers took a closer look—analysis revealed that when the drop was placed in the solution, a charge imbalance occurred between the front and back of the drop, causing a pressure differential. They also found that as the aluminum reacted with the saltwater, tiny bubbles were formed which also served to push the drop forward (so long as the aluminum bit was on the back end.)The experiments by the team build on prior work by them and others (as part of an effort to make “soft” robots) that showed that with some liquid metals, an electric charge can cause both an expansion and change of shape to a drop. The researchers note that if both techniques were used, the result could be drops that not only move themselves through liquids, but change shape according to predetermined needs. They suggest their findings could conceivably pave the way for drops that are used to deliver materials via pipes or even through blood vessels. Play Credit: Advanced Materials, Article first published online: 3 MAR 2015. DOI: 10.1002/adma.201405438 Interestingly, the researchers also noted that if the drop were forced to remain in place in the solution it would cause the liquid around it to move, in essence serving as a pump.
Explore further Citation: Study results suggest slower seismic waves due to quakes may signal weak spots in crust (2016, January 11) retrieved 18 August 2019 from https://phys.org/news/2016-01-results-slower-seismic-due-quakes.html Figuring out how to predict when and where major earth quakes may strike is an ongoing process—scientists have learned a lot, but they still cannot say with any degree of accuracy when a major quake might strike a given area. In this new effort, the research pair believes they have uncovered another geological clue that might help predict future quakes.Recognizing that earthquakes generate powerful seismic waves that travel through underground rock, the researchers wondered if it might be possible to figure out if and where such seismic waves cause underground damage that could cause another area to be more susceptible to a quake. They focused their attention on Nicoya Peninsula, which is located on the Pacifica coast of Costa Rica, for two reasons. The first was because the area experienced a major earthquake just three years ago; the other was because seismic wave speed tests had been conducted in the area before the quake struck. They ran similar speed tests after the quake to see if there might be any difference—if so, this would suggest that damage had occurred to the rock, causing breaks, which would slow the speed of seismic waves passing through. And if that were the case, it would suggest that the rock in that location was weaker than it had been, and thus the area would be more likely to experience a quake of its own.In conducting seismic tests in the area, the research pair found places where the waves traveled approximately 0.6 percent slower after the big quake, than they had before it occurred. Their finding also added credence to a theory that suggests that fluids underground can make rock more susceptible to fracturing when a nearby earthquake occurs. Prior research had shown that there was highly pressurized fluid under the peninsula, which the new researchers propose, contributed to fracturing and slowed seismic wave speed. The researchers suggest this means that an earthquake is likely to happen sooner in those areas than it would have prior to the impact of the 2012 earthquake. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Journal information: Science Advances More information: E. J. Chaves et al. Monitoring transient changes within overpressured regions of subduction zones using ambient seismic noise, Science Advances (2016). DOI: 10.1126/sciadv.1501289AbstractIn subduction zones, elevated pore fluid pressure, generally linked to metamorphic dehydration reactions, has a profound influence on the mechanical behavior of the plate interface and forearc crust through its control on effective stress. We use seismic noise–based monitoring to characterize seismic velocity variations following the 2012 Nicoya Peninsula, Costa Rica earthquake [Mw (moment magnitude) 7.6] that we attribute to the presence of pressurized pore fluids. Our study reveals a strong velocity reduction (~0.6%) in a region where previous work identified high forearc pore fluid pressure. The depth of this velocity reduction is constrained to be below 5 km and therefore not the result of near-surface damage due to strong ground motions; rather, we posit that it is caused by fracturing of the fluid-pressurized weakened crust due to dynamic stresses. Although pressurized fluids have been implicated in causing coseismic velocity reductions beneath the Japanese volcanic arc, this is the first report of a similar phenomenon in a subduction zone setting. It demonstrates the potential to identify pressurized fluids in subduction zones using temporal variations of seismic velocity inferred from ambient seismic noise correlations. (Phys.org)—A pair or researchers, both with the University of California, Santa Cruz has found via field study that seismic waves passing through rock can be slowed down due to cracking by an earthquake. In their paper published in the journal Science Advances, Esteban Chaves and Susan Schwartz suggest that their findings may indicate that it is possible to identify weakened places in the crust following earthquakes that may make other places more vulnerable to a future quake. © 2016 Phys.org Researchers find cascading elastic perturbation likely contributed to small earthquakes in Japan Seismogram being recorded by a seismograph at the Weston Observatory in Massachusetts, USA. Credit: Wikipedia
Citation: ‘Mayonnaise effect’ explains breakdown of 1929 viscosity equation (2018, January 4) retrieved 18 August 2019 from https://phys.org/news/2018-01-mayonnaise-effect-breakdown-viscosity-equation.html The 1929 Jones-Dole equation, which accurately predicts viscosity changes in solutions at lower concentrations, breaks down at higher concentrations (above 1 Molar) like those present in syrup and mayonnaise. So far, the rapid increase in viscosity at high concentrations has not been explained by either a mathematical expression or a microscopic physical theory.Now in a new study, Klaas Wynne, a professor of chemical physics at the University of Glasgow, has proposed what he calls the “mayonnaise effect” to explain the dramatic increase in viscosity that occurs not just in mayonnaise, but in all highly concentrated solutions. His results are published in a recent issue of The Journal of Physical Chemistry Letters.”The ‘mayonnaise effect’ is a lovely simple little idea that has much wider applicability: in any case in which a liquid is structured in some way, the viscosity will increase nonlinearly due to the presence of a virtual jamming transition at a very high concentration,” Wynne told Phys.org. “Therefore, the mayonnaise effect also applies to the intrinsic structuring in room-temperature ionic liquids, in deep eutectic solvents, concentration fluctuations near critical points, and of course liquid mixtures including mayonnaise. The mayonnaise effect applies to all solutions and liquid mixtures, and is therefore very widely applicable.” In his paper, Wynne explains how the jamming transition occurs. When a solute containing ions is added to a solution, the liquid molecules (for example, water) form clusters around the ions. At a critical concentration, the motion of the ion/liquid clusters freezes or jams. As Wynne explains, the approach of this jamming transition marks the changeover from the regime described by the Jones-Dole equation to a regime in which viscosity increases much more rapidly. The mayonnaise effect, then, is an example of a colligative property, meaning it depends primarily on the concentration of the solute rather than on the solute’s chemical or physical properties.To mathematically describe the dependence of viscosity on concentration, Wynne has proposed modifications to the Jones-Dole equation, motivated by the Vogel-Fulcher-Tammann equation that describes the viscosity of supercooled liquids and glasses as they approach the critical glass transition temperature. Wynne showed that the new modified equation provides a good fit for much of the previously published viscosity data, other than a few expected outliers. The results reveal a connection between glass formation and mayonnaise formation, as in both cases viscosity depends on concentration in a similar fashion.In the future, Wynne plans to further investigate the implications of the mayonnaise effect.”I’m currently hugely interested in the physical manipulation of phase transitions such as demixing of liquids and nucleation of crystals in which the mayonnaise effect plays an important role,” Wynne said. In the mayonnaise effect, a jamming transition occurs when a large amount of solute is added to a solution. At a critical solute concentration, the motion of the ion/liquid clusters freezes or jams, which causes the viscosity to dramatically increase. Credit: Wynne. ©2017 American Chemical Society Unusual thermal convection in a well-mixed fluid
Journal information: Science Advances A study from a research team from the Georgia Tech found that the vast majority of scientists disclose key details about their work informally to peers and potential collaborators ahead of publishing. Credit: Georgia Tech Citation: Study of prepublication disclosure shows some do and some don’t (2018, May 17) retrieved 18 August 2019 from https://phys.org/news/2018-05-prepublication-disclosure-dont.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
I’m living in a hostel. I have got physically involved with my room mate. I’m not gay but I find him attractive. What should I do!Name withheld, New DelhiYou could be bisexual. And if you feel uneasy about that, you really have to sit back and understand your sexual preference. Nobody can do that for you! In the long run, you need clarity about your own self! Bisexuality is no crime but this might affect your sex life in the future. Please take all necessary precautions and don’t have unprotected sex with anyone. Also Read – ‘Playing Jojo was emotionally exhausting’I’m 40 years old and the only daughter of my parents. My father expired 5 yeas back and my mom is too dependent on me. I want to get married but nobody seems interested in that! What do I do?Rekha, Madhya PradeshWell, this is sad but the reality is you, yourself need to initiate the process of marriage. If there’s no prospective groom, you surely can register on online matrimonial sites or resort to newspaper ads. Keep in mind that the man you choose is someone who will understand your situation and help you take care of your mother. I understand, this situation is definitely a bit depressing and demanding, but you have to help yourself and look out for your ideal partner. All the best Rekha! Also Read – Leslie doing new comedy special with NetflixI have developed this habit of visiting red-light areas and having sex with prostitutes. I’m a student and feel addicted towards this. How can I come out of it?Name and location withheldYou have to come out of this for your own good! Life is no film and this has to get over NOW! We all fantasise about various things and I’m sure you’ve lived your quota of sexual fantasy. It’s time to end this and look for a perfect girl for you who will help cool your mind, soul and body. Hope that you have been sexually safe. Sincerely request you to go through the required tests for STD (Sexually transmitted disease) checks. Play safe boy. My daughter has developed the ugly habit of smoking. I’m very upset. What can I do to help her come out of it?Ragini Sharma, New DelhiYou can directly tell her how you feel towards her habit. Make her conscious about your feelings. We all know the dark truth about smoking but quitting it is one’s own decision. This could be just a phase but you as a parent should insist so that she quits soon. Be firm, don’t nag. Leave reading materials on quitting techniques on her desk/room. Emotional blackmail work wonders on kids and I’m sure she will soon realise and make you a happy parent!I stammer. I feel conscious. What should I do to overcome this?Dilip, HaryanaJust start by not getting conscious. Forget that you have a difficulty in speech. Initially try to participate in conversations with small sentences or just words. Develop this gradually and every morning look into the mirror and say – I’m GOOD…I try to be perfect!!! Trust me, you’ll soon overcome. You can and you will!Have a love or life query you cannot find an answer to? Send your questions to – [email protected]
TO celebrate the 60th anniversary of Lalit Kala Akademi, a musical concert is being organised in the Capital where santoor maestro and composer Abhay Rustum Sopori will inaugurate the function with his performance. The evening will be graced by Shripad Yesso Naik, Hon’ble Minister for Culture, Govt of India.Sopori’s music will take on a journey of India through the musical notes of Santoor in unison with the classical, Sufi, traditional and ethnic sounds and drums of India presenting a cultural ethos of India enchanting the listeners and taking them into a state of ecstacy – the Irfaan. Also Read – ‘Playing Jojo was emotionally exhausting’The concert will feature around 30 musicians on santoor, tabla, pakhawaj, mridangam, gattam, khol, nakara, nagada, tumbaknari, drums, percussions, sarangi, vocals, cello and double base guitars. Sopori is the youngest santoor maestro and classical musician to compose and conduct orchestras, folk and sufi ensembles. He has been the youngest recipient of all the awards he has received including the prestigious Sangeet Natak Akademi’s first Ustad Bismillah Khan Yuva Puraskar, J&K State Award (the highest Civilian Award of the State of Jammu & Kashmir), Sangeet Mani Award, Glory of India Award, Best Citizens of India Award, Bharat Shiromani Award, Sangeet Bhushan Award and many more. His name also features in various Biographical-note volumes.When: 5 August Where: Kamani Auditorium, Copernicus MargTiming: 6:00 pm
Kolkata: The Calcutta High Court on Thursday directed BJP state president Dilip Ghosh to produce documents in connection with his educational qualification. The directions came in the wake of a PIL by petitioner Ashok Sarkar in May last year.The petitioner had alleged that Ghosh had submitted a false affidavit while contesting the 2016 state elections from Kharagpur, claiming that he was an alumnus of Jhargram Polytechnic College. He had also submitted a purported RTI report, saying there was no such college in the state. He had pleaded for Ghosh’s election from the Kharagpur Sadar seat to be nullified. A division bench headed by Chief Justice Jyotirmoy Bhattacharjee, asked the state BJP president to file an affidavit, along with his original academic certificates, in June. Also Read – Heavy rain hits traffic, flightsAdvocate Mohammad Ariff, who represented the petitioner at the court, said that Ghosh had been claiming that he had passed out from Ishwarchandra Polytechnic at Kharagpur. “But when my client approached the college through another RTI application, he was informed that between 1975 and 1990, no Dilip Ghosh had appeared in any exam in the college,” he maintained. It may be mentioned that Ghosh was elected to the West Bengal Assembly in 2016, from the Kharagpur Sadar constituency. The Chief Justice wondered on Thursday: “Is it believable that a person has forgotten the name of the institution from which he had passed out?” The matter has been scheduled for hearing on June 8.